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Aluminum Extraction Machine Aluminum

Oct 17, 2013· PrimaryAluminiumHistory: People often think ofaluminumas a cheap and plentifulmetal, but 130 years agoaluminumwas considered rare and expensive. According to the book “Chemical Principles,” refiningaluminumfrom bauxite was so costly in the 19th century that the Washington Monument was given analuminumtip to symbolize its value.

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